电力建设2018，Vol.39Issue(5)：38-45,8.DOI:10.3969/j.issn.1000-7229.2018.05.005
一种改进的模块化多电平换流器电压均衡控制策略
An Improved Voltage Balancing Method for Modular Multilevel Converter
摘要
Abstract
Because of the preferable performance, modular multilevel converters (MMCs) have a wide application prospect in some fields including large-scale interconnection of power grids. Firstly, this paper analyzes the operational principle of MMC system, and combines the method of redundant configuration to design the optimal quantity of sub-modules on MMC arms. And then,based on the nearest level modulation (NLM) algorithm,an improved control strategy for capacitor voltage balancing of MMC is proposed, in which redundant sub-module has the charging priority to ensure its voltage stay at the level higher than the lowest standard,so that failure sub-module may be replaced smoothly. Finally,the effectiveness of the proposed control strategy is verified through simulation in PSCAD/EMTDC.关键词
模块化多电平换流器(MMC)/冗余配置/电容电压均衡策略/最近电平逼近(NLM)/子模块冗余保护Key words
modular multilevel converter/redundant configuration/capacitor voltage balancing strategy/nearest level modulation/redundancy protection of sub-module分类
信息技术与安全科学引用本文复制引用
张天,姜斌,龚雁峰..一种改进的模块化多电平换流器电压均衡控制策略[J].电力建设,2018,39(5):38-45,8.基金项目
中央高校基本科研业务费专项资金资助项目(2017XS015)This work is supported by the Fundamental Research Funds for the Central Universities(No.2017XS015). （2017XS015）
